FAQ and Ask Engineering

Have a technical question? Scroll through our FAQs list below. Still have a technical question? Then ask the engineering guys. Replies will be sent within 24 hours.

What kind of media does Defender™ use?
Defender™ will work with perlite or diatomaceous earth (DE). Neptune-Benson prefers the use of perlite based on its superior particle removal, lower cost, lower turbidity levels and safer handling and disposal.

How does the cost of Defender™ compare to sand filters?
The initial capital cost of a Defender™ system is more than a sand system but is quickly offset in operational costs – often in less than a year. The smaller Defender™ system saves on construction costs, water and waste costs, energy and chemical costs as well as power costs.

Is there a pool size limit in order to use Defender™ filters?
No, there is no pool size limit. Defender™ may be installed on 250-600GPM pools and spas and larger. Defender’s may be installed in tandem to accommodate any pool size.

How long does “bumping” take?
Defender™ filters are programmed to bump daily and will take no longer than 10-15 minutes with the complete automated cycle.

Is the Defender™ filter system fully automatic?
Every Defender™ system is designed to be fully automatic but is operable in semi-automatic mode which requires the push of a button to initiate the bump cycle.

What happens to peripheral systems (heat, chemicals, UV) when the Defender™ shuts down for bumping?
Defender’s programmer includes auxiliary contacts to control all peripheral devices.

How long does it take to change the media?
Recharging the media in a single Defender™ takes 15 – 25 minutes. The filter cycle usually ranges from 2 to 4 weeks depending on bather load. Some pools may go months in the off season.